Vat dyestuffs



Patented Dec. 20, 1938 l UNITED STATES PATENT OFFICE VAT DYEST'UFFS Ernst Honold, Frankfort-on-the-Main-Fechenheim, Germany, assignor to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. Application August 5, 1936, Serial No. 94,339. In Germany August 10, 1935 1 Claim. (Cl. 260274) My invention relates to valuable new vat dyetreating the condensation product formed in stuffs, more particularly to those of the general either sequence with an alkaline condensing and formula: an acylating agent.

Or a Bzi-halogeno-benzanthrone is condensed with an acylamino-amino-diphthaloylcarbazol and the condensation product formed is subjected to the action of an alkaline condensing agent which is free from hydroxyl groups. When an alkaline condensing agent containing a hydroxyl group is used, then the acyl group is simultaneously split off and various acyl radicles may be subsequently introduced into the free amino group.

The new dyestuffs, which differ from those of the U. S. Patent No. 1,891,684, dye cotton very 7 fast brownish to olive to greenish shades.

X X In order to further illustrate my invention the following examples are given, the parts being by wherein one Xmeans an acylamino group and the Weight and n temperatures in entigrade other mean hydrogen and wherein one pair grees; but it is, however, to be understood that my 20 of adjoining Garbo? atoms marked Y and Y1 is invention is not limited to the particular products connected with a Bzi-ammobenzanthronyl radicle nor reacting conditions mentioned therein,

the amino group of which is attached to a carbon atom marked Y1, and the other carbon atoms Examplez marked Y and Y1 are connected with hydrogen 31 parts of Bzi-bromobenzanthrone are con- 25 atoms. Particularly valuable are the dyestuffs of densed either with 56 parts of 5-amino-5-benthe following general formula: zoylamino-diphthaloy1carbazol or with 45 parts 01 1 5.5-diamino-diphthaloylcarbazol in which latter case the condensation product formed is subsequently benzoylated. 30

A 78 parts of the anthrimide thus obtained of the formula:

I I NH 0 NH co 6 \C 0/ i 45 m a a 50 acyl v The new dyestufis are manufactured for example by starting from diamino-diphthaloylcar- NH.CO.Ce

bazols, condensing them with one molecular proare added at about 140 to a solution of 250 parts portion of a Bzr-halogeno-benzanthrone and of sodium aniline in about 800 parts of anhydrous 55 aniline. Then nitrogen is passed through the mass the temperature of which is maintained at about 140, until no unchanged starting material is present. When cool the reaction mass is poured into an excess of dilute hydrochloric acid and the precipitate formed is filtered off, washed and dried. The new dyestuff thus obtained of the formula:

IYIH CO I IELCQCeHs dissolves in concentrated sulfuric acid with a greenish blue color and dyes cotton from a brown vat very fast yellowish olive shades.

Example 2 parts of 5,5-diamino-diphthaloylcarbazol are condensed with 31 parts of Bz1-bromobenzanthrone and the condensation product formed is fused with alcoholic caustic potash. The product thus obtained of the formula:

dissolves in concentrated sulfuric acid with an olive green color and dyes, when precipitated from this solution, cotton from a brown vat dark brown shades. v

68 parts of this condensation product are finely divided and boiled for some hours with about 700 parts of o-dichlorobenzene and '70parts of benzoylchloride in an apparatus provided with a reflux condenser. The dyestuff formed of the formula:

Example 3 68 parts of the condensation product obtained according to Example 2 of the formula:

are finely divided and boiled for some hours with about 700 parts of acetic acid anhydride in an 75 parts of anthraquinone-2-carboxy1ic acid chloride apparatus provided with a reflux condenser. The dyestufi formed of the formula:

NH.CO.CH2

dyes cotton from a brown vat khaki shades of good fastness properties and dissolves in concentrated sulfuric acid with an olive green color. When it is precipitated from this solution, it dyes cotton more greenish shades of equal fastness properties.

Example 4 68 parts of the condensation product obtained according to Example 2 of the formula:

are finely divided and boiled for some hours with about 1000 parts of o-dichlorobenzene and 30 in an apparatus provided with a reflux condenser.

The dyestufi formed of the formula:

NH.CO

Example 56 parts of 4-benzoylamino-4'-amino-diphthaloylcarbazol are condensed with 31 parts of B21- bromobenzanthrone and the condensation prodnot formed is fused with alcoholic caustic potash. The product thus obtained of the formula:

dyes cottonfrom a brown vat brown insumcient fastness properties.

68 parts of this condensation product are treated according to the method described in Example 2 with '70 parts of benzoylchloride or the corresponding amount of benzoic anhydride in o-dishades of cording to'the method described in. Example 2.

The dyestuif thus obtained of the formula:

chlorobenzene. The dyestufi thus obtained of the for- NH mula:

oo co 00 co I EN (I00 00 EN 00 I 1 co CO NH.CO.CH; NH.CO.CH5 dissolves in concentrated sulfuric acid with a brownish black color and dyes cotton from a brown vat fast brown shades. CO I I claim:

HN A vat dyestuif of the formula:

co &

I IH.CO.CtH5 0 dissolves in concentrated sulfuric acid with a brownish violet color. When precipitated from this solution it dyes cotton from a brown vat brownish violet shades.

Example 6 45 parts of 4,5-diamino-diphthaloylcarbazol are condensed with 31 parts of Bzi-bromobenzanthrone and the condensation product formed is fused with alcoholic caustic potash. The prodnot thus obtained of the formula:

l NH:

Nncomm dissolves in concentrated sulfuric acid with a which dyestuff dissolves in concentrated sulfuric brownish black color and dyes cotton from the vat brown shades of insufiicient fastness properties.

68 parts of this condensation product are benzoylated with 70 parts of benzoylchloride acacid with a greenish blue color and dyes cotton from a brown vat very fast yellowish olive shades.

ERNST HONOLD. 

